JP5087436B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an air conditioner, and in particular, to measures for invading pests into an electrical component box of an outdoor unit.

Generally, the separation type air conditioner includes an outdoor unit and an indoor unit connected to the outdoor unit via a communication pipe. In this conventional outdoor unit, an outdoor fan that is arranged on the front side of the outdoor heat exchanger and the outdoor heat exchanger and blows outside air is housed in a heat exchange chamber partitioned by a partition plate inside the housing. In the machine room on the side of the heat exchange chamber, a compressor, an expansion valve and the like are housed. In addition, an electrical component box is disposed above the inside of the housing across the heat exchange chamber and the machine room. A cooling air inlet is opened on the machine room side of the electrical component box, and the heat exchange chamber A cooling air outlet is opened on the suction side of the outdoor fan. In the outdoor unit configured as described above, during operation, the heat exchange chamber becomes negative pressure due to the rotation of the outdoor blower, the outside air flows into the machine room from the outside air intake, and flows through the electrical component box from the cooling air intake port. Then, the electrical components are cooled, and the electrical components are prevented from overheating by flowing out from the cooling air exhaust port to the heat exchange chamber. (For example, see Patent Document 1)
JP 2003-294271 A

However, there has been a problem that insects entering the machine room or heat exchange room enter the electrical component box, causing a short circuit in the control board, resulting in malfunctions such as functional damage.
In particular, when a long and narrow insect such as a centipede enters the gap between the bottom of the electrical box and the control board, there is a problem that many faults occur due to the centipede in the high voltage conduction part on the back of the control board where multiple voltage patterns intersect. there were.
In addition, cost reduction was necessary due to the low price of the product.

This invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the structure is divided by a partition plate between a heat exchange chamber having a fan and a heat exchanger and a machine room having a compressor in the housing. In an outdoor unit of an air conditioner equipped with an electrical component box that takes in the cooling air from the machine room side and discharges the cooling air that has passed through the interior to the heat exchange chamber side, a control board is mounted on the bottom surface of the electrical component box Are provided with an appropriate gap, and a hole such as a cooling air suction port is also provided on the bottom surface of the electrical component box, so that the gap is reduced between the high voltage conduction portion provided on the bottom surface of the control board and the hole. Rutotomoni provided on the bottom surface of the electrical component box facing the ribs on the control board, the rib was provided around the hole.

According to this invention, the control board is attached to the bottom surface of the electrical component box with an appropriate gap, and a hole such as a cooling air suction port is provided on the bottom surface of the electrical box, and the high voltage conduction portion provided on the bottom surface of the control board. Since the rib for reducing the gap is provided between the hole and the bottom of the electrical component box facing the control board, insects such as centipedes are present in the electrical component box without impairing the cooling function of the control board. Even if it penetrates, the centipede rarely penetrates to the high voltage conduction part provided on the bottom of the control board where the short circuit is most likely to occur, and there is no need to worry about malfunctions such as functional breakdown.
In addition, since the electrical component box is formed by resin molding and the rib, the suction port, and the exhaust port are integrally formed when the electrical component box is molded, there is almost no special cost.

Next, an outdoor unit of an air conditioner according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes a housing constituting an outer frame of the outdoor unit, a base 2 on the bottom surface, a front plate 3 on the front surface, a heat exchanger cover 4 formed from the left side to the back, and a machine room side plate formed from the right side to the back. 5 and a top plate 6 that covers the upper surface.

The inside of the housing 1 is partitioned by a partition plate 7 into a heat exchange chamber 8 and a machine chamber 9 in the left-right direction.
A motor mount 10 screwed to the base 2 is provided at the center of the heat exchange chamber 8, and a fan motor 11 is mounted at a substantially center in the height direction of the motor mount 10. And it fixes to the rotating shaft of this fan motor 11, and the propeller fan 12 is provided ahead.

A fin-tube heat exchanger 13 is provided in a square shape in a plan view on the rear and left sides of the fan 12, and air is sucked from the rear or left side of the heat exchanger 13 by the rotation of the fan 12. 12 The air after heat exchange is blown forward from a circular outlet 14 provided in front of the front plate 3 facing the fan 12.
The lower part of the machine room side plate 5 has a connection fitting projection 15 for connecting a refrigerant pipe to an indoor unit (not shown), and the middle part of the machine room side plate 5 has a connection wire connection port for connection to the indoor unit. 16 is provided.

  An upper part of the machine room 9 is provided with an electrical component box 18 in which electronic parts such as a control board 17 are accommodated, and a compressor 19, which is the largest part, stands from the base 2 in the center of the machine room 9. The reactor 20 is attached to the partition plate 7 in the space between the compressor 19 and the electrical component box 18.

  The electrical component box 18 is manufactured by integral molding of resin. The electrical component box 18 has a number of cooling air inlets on the front, right side, and bottom of the electrical component box 18 that communicate with the machine room 9 and the electrical component box 18. 21, and a cooling air exhaust port 22 communicating the heat exchange chamber 8 and the electrical component box 18 is provided on the back of the electrical component box 18.

  The bottom surface 23 of the electrical component box 18 is provided not only with the cooling air inlet 21 but also with many holes 24 necessary for molding the electrical component box 18 on the right side. The control board 17 is attached to the bottom surface 23 of the electrical component box 18 with a gap A (about 5 mm in this embodiment), and the high voltage conduction indicated by the cd part in FIG. The portion 25 is provided, and in this embodiment, the c portion is plus DC 280V, and the d portion is minus DC 280V. Therefore, the potential difference between the c portion and the d portion becomes 560V, and the centipede enters and the c portion and the d portion In order to prevent the centipede from entering from the hole 24 in order to prevent this, a short circuit occurs and the control board 17 is damaged. A rib 26 having a height B (3 mm) is provided around the periphery of the hole 24. Instead of providing the rib 26 around the hole 24, the rib 26 is provided so as to surround the periphery of the high voltage conducting portion 25. Prevent centipede invasion It is those that can.

  The reason why the height B of the rib 26 is set to 3 mm and the gap C (2 mm) is left is to cool the lower surface of the control board 17. In this embodiment, if the gap C is smaller than 2 mm, the control board 17 However, the height B of the rib 26 and the size of the gap C are appropriately adjusted according to the size of the control board 17 and the amount of heat generated.

  Since a large insect such as a centipede hardly enters when the gap C in this embodiment is 2 mm, the possibility of a failure caused by the insect is extremely reduced. If it can be made smaller, the possibility of failure is further reduced.

Since the rib 26 can be formed integrally with the resin molding at the same time as the electrical component box 18 is molded, no extra costs are incurred.
Further, since the upper surface of the control board 17 has a relatively small exposed area of high voltage, even if a bug such as a centipede walks on the upper surface of the control board 17, the occurrence of a short circuit is extremely small.

  Explaining the ventilation path during operation of the air conditioner, the fan motor 11 and the fan 12 are rotated by the operation of the air conditioner, and air is blown from the heat exchanger 13 side in the heat exchange chamber 8 to the outlet 14. At this time, the periphery of the cooling air exhaust port 22 of the electrical component box 18 in the heat exchange chamber 8 becomes negative pressure, and is provided in the gap between the connection fitting projection 15 and the connection wire connection port 16 or in the base 2 on the machine chamber 9 side. The air sucked from a hole or the like (not shown) once flows into the machine chamber 9, passes through the electrical component box 18 from the cooling air suction port 20 or the hole 24, and then passes through the cooling air exhaust port 22 to the heat exchange chamber 8. The heat generated from the electrical component can be exhausted by exhausting the air.

In addition, regardless of whether the air conditioner is in operation or stopped, even if insects such as centipedes invade from the gaps existing at various places in the entire housing 1, the height provided on the bottom surface 23 of the control board that is most likely to cause a short circuit. The centipede is less likely to enter the voltage conducting portion 25, and there is no need to worry about malfunctions such as functional breakdown.
Further, since the electrical component box 18 is formed by resin molding and the rib 26, the suction port 21 and the exhaust port 22 are integrally formed when the electrical component box 18 is molded, there is almost no special cost.
Further, the upper surface of the electrical component box 18 is closed in contact with the top plate 6.

1 is an exploded perspective view of an embodiment of the present invention. The perspective view of the principal part. Sectional drawing of the principal part. The schematic of the plane which shows the pattern of the same control board, an electrical equipment box, and a rib. The perspective view of the bottom of the same electrical component box.

Explanation of symbols

8 Heat Exchange Room 9 Machine Room 17 Control Board 18 Electrical Component Box 21 Cooling Air Suction Port 22 Cooling Air Exhaust Port 23 Bottom Surface 24 Hole 25 High Voltage Conducting Portion 26 Rib

Claims (2)

The housing is partitioned by a partition plate between the heat exchange chamber with the fan and heat exchanger and the machine room with the compressor, the cooling air is taken in from the machine room side, and the cooling air circulated inside is exchanged In an outdoor unit of an air conditioner equipped with an electrical component box that discharges to the room side, a control board is attached to the bottom surface of the electrical component box with an appropriate gap, and cooling air is sucked into the bottom surface of the electrical component box. a hole mouth or the like is provided, between the high voltage conducting portion provided in the control board bottom surface and the bore, Rutotomoni provided on the bottom surface of the electrical component box facing the ribs to reduce the gap to the control board, the rib An air conditioner outdoor unit characterized by being provided around a hole . The housing is partitioned by a partition plate between the heat exchange chamber with the fan and heat exchanger and the machine room with the compressor, the cooling air is taken in from the machine room side, and the cooling air circulated inside is exchanged In an outdoor unit of an air conditioner equipped with an electrical component box that discharges to the room side, a control board is attached to the bottom surface of the electrical component box with an appropriate gap, and cooling air is sucked into the bottom surface of the electrical component box. A hole such as a mouth is provided, and a rib for reducing the gap is provided between the high voltage conducting portion provided on the bottom surface of the control board and the hole on the bottom surface of the electrical component box facing the control board. An outdoor unit for an air conditioner, which is provided around the bottom surface of an electrical component box facing a voltage conducting portion .

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